Tried to jail each user in his own folder by VirtualDocumentRoot, thought it might help but alas but no can do yet, DocumentRoot does not unserstand % masks

VirtualDocumentRoot "C:/aweb/freehosting/users/%1" with varaiable works just fine but not php_admin_value switch
php_admin_value open_basedir "C:/aweb/freehosting/users/%1" – this stuff does not work…. Is there any other way to solve my problem?

Php error says
Warning: Unknown: open_basedir restriction in effect. File(C:/aweb/freehosting/users/zxc/zzz.php) is not within the allowed path(s): (C:/aweb/freehosting/users/%1) in Unknown on line 0

Warning: Unknown: failed to open stream: Operation not permitted in Unknown on line 0

Warning: Unknown: open_basedir restriction in effect. File(C:/aweb/freehosting/users/zxc/zzz.php) is not within the allowed path(s): (C:/aweb/freehosting/users/%1) in Unknown on line 0

Warning: Unknown: failed to open stream: Operation not permitted in Unknown on line 0

Warning: Unknown: Failed opening 'C:/aweb/freehosting/users/zxc/zzz.php' for inclusion (include_path='.;C:\server\xampp\php\pear\') in Unknown on line 0

VirtualDocumentRoot "C:/aweb/freehosting/users/%1"
#DocumentRoot "C:/aweb/freehosting/users/%1"
#here I manually set to users folder where every user is being stored
#it more secure but not yet full enough to me, I want to jail them in their #folders

php_admin_value open_basedir "C:/aweb/freehosting/users/"

after that if Hacking tool Remview.php goes upper than "C:/aweb/freehosting/users/"
says

Can't open directory C:/aweb/freehosting/
Reason:
Warning: is_dir() [function.is-dir]: open_basedir restriction in effect. File(C:/aweb/freehosting/) is not within the allowed path(s): (C:/aweb/freehosting/users/) in C:\aweb\freehosting\users\zxc\remview.php on line 425

How to jail them in their folders?
How to allow people to use more .htaccess but still it would be secure for my server and other people?